package com.sky.service.impl;

import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.vo.EmployeeVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

/*
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        Employee employee = employeeMapper.getByUsername(username);

        if(!password.equals(employee.getPassword())){
            throw new PasswordErrorException("密码错误");
        }

        String md5Password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        return null;
    }
*/

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }


        //密码比对
        String md5Password = DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!md5Password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

       if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象2
        return employee;
    }

    /**
     * 添加员工
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));
        employee.setStatus(StatusConstant.DISABLE);
  /*      employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setCreateUser(BaseContext.getCurrentId());
*/
        employeeMapper.add(employee);

    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {

        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        List<Employee> employees= employeeMapper.page(employeePageQueryDTO);


        return new PageResult(employees.size(),employees);
    }

    @Override
    public void updateEmp(Integer status, Long id) {
        Employee employee=Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询
     *
     * @param id
     * @return
     */
    @Override
    public EmployeeVo selectById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        EmployeeVo vo =new EmployeeVo();
        BeanUtils.copyProperties(employee,vo);

        return vo;
    }

    /**
     * 修改员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

       /* employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        employeeMapper.update(employee);

    }

    /**
     * 根据id修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        Employee SelectEmp = employeeMapper.selectById(BaseContext.getCurrentId());
        String password = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());

        if(!SelectEmp.getPassword().equals(password)){
            throw new  PasswordEditFailedException(MessageConstant.PASSWORD_ERROR);
        }

        Employee employee = Employee.builder()
                .id(BaseContext.getCurrentId())
                .password(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()))
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId()).build();

        employeeMapper.update(employee);

    }
}
